的UIImagePickerController - 得到的照片庫中選擇圖像

Question

我試圖將圖像從我的iPhone/iPod touch的上傳到我的在線資源庫，我已經成功地從相冊選擇了圖像的名字，但我現在面臨一個問題，我想知道圖像的名稱，如image1.jpg或類似的東西。我如何知道所選圖像的名稱。

Answer 1

我想知道確切的映像名稱將不會是相當得到一個唯一的名稱爲攝取的圖像會解決你的目的，使您可以上傳在服務器上的圖像，並通過它的名字跟蹤它的問題。可能是這樣可以幫助你

NSMutableString *imageName = [[[NSMutableString alloc] initWithCapacity:0] autorelease]; 

CFUUIDRef theUUID = CFUUIDCreate(kCFAllocatorDefault); 
if (theUUID) { 
    [imageName appendString:NSMakeCollectable(CFUUIDCreateString(kCFAllocatorDefault, theUUID))]; 
      CFRelease(theUUID); 
} 
[imageName appendString:@".png"]; 

從拾取器中選擇圖像後，您可以生成一個唯一的名稱並將其分配給Picked圖像。 乾杯

Answer 2

而是使用通常的圖像拾取方法(UIImage*)[info valueForKey:UIImagePickerOriginalImage]，讓你選擇的圖像作爲UIImage的的一個實例的，則可以使用AssetsLibrary.framework並導出實際的源文件（包括格式，名稱和所有的元數據）。這也保留了原始文件格式（png或jpg）的優點。

#import <AssetsLibrary/AssetsLibrary.h> 

- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info { 
    [self dismissPicker]; 
    // try to get media resource (in case of a video) 
    NSURL *resourceURL = [info objectForKey:UIImagePickerControllerMediaURL]; 
    if(resourceURL) { 
     // it's a video: handle import 
     [self doSomethingWith:resourceURL]; 
    } else { 
     // it's a photo 
     resourceURL = [info objectForKey:UIImagePickerControllerReferenceURL]; 

     ALAssetsLibrary *assetLibrary = [ALAssetsLibrary new]; 
     [assetLibrary assetForURL:resourceURL 
         resultBlock:^(ALAsset *asset) { 
          // get data 
          ALAssetRepresentation *assetRep = [asset defaultRepresentation]; 
          CGImageRef cgImg = [assetRep fullResolutionImage]; 
          NSString *filename = [assetRep filename]; 
          UIImage *img = [UIImage imageWithCGImage:cgImg]; 
          NSData *data = UIImagePNGRepresentation(img); 
          NSString *cacheDir = [NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES) lastObject]; 
          NSURL *tempFileURL = [NSURL fileURLWithPath:[cacheDir stringByAppendingPathComponent:filename]]; 
          BOOL result = [data writeToFile:tempFileURL.path atomically:YES]; 
          if(result) { 
           // handle import 
           [self doSomethingWith:resourceURL]; 
           // remove temp file 
           result = [[NSFileManager defaultManager] removeItemAtURL:tempFileURL error:nil]; 
           if(!result) { NSLog(@"Error removing temp file %@", tempFileURL); } 
          } 
         } 
        failureBlock:^(NSError *error) { 
         NSLog(@"%@", error); 
        }]; 
     return; 
    } 
}